| Titre : | Controllable preparation of polyacrylamide hydrogel microspheres in a coaxial microfluidic device (2012) |
| Auteurs : | Bodong Yang, Auteur ; Yangcheng Lu, Auteur ; Guangsheng Luo, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 26, Juillet 2012) |
| Article en page(s) : | pp. 9016-9022 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Fluid mechanics Microfluidics Microsphere Preparation |
| Résumé : | A thermal-initiated polymerization procedure is described for the controlled preparation of monodispersed polyacrylamide (PAM) hydrogel microspheres. A coaxial microfluidic device was designed to disperse uniform drops (∼500 μm) of acrylamide monomer aqueous solution into n-octane. Using a delay loop immersed into a heat bath, the polymerization is initiated and carried out in separate droplets. Combining the improvement of heat transfer in the microfluidic device and the sufficient addition of n-octane, the controllable preparation can still be achieved at 95 °C, much higher than 20-60 °C as reported prevalently. Herein, the PAM microspheres can be prepared within 2 min or less, with the CV of diameter less than 4%. Furthermore, based on this controllable reaction platform, PAM microspheres were prepared at various reaction temperatures (higher than 90 °C) and monomer solution compositions to investigate the fundamental rules of controlling on their skeleton structure and absorbent capacity in deionized water. |
| DEWEY : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=26107459 |
